How to Diagnose Flashing LED on DS744Z

What does it mean when the LED flashes on the motion (PIR)?

 

 

LED                                    Cause

On                                      Unit Alarm or Stored Alarm

Flashing 2                           Motion Monitor Timeout

Flashing 3                           Antimask Detection

Flashing 4                           PIR Self test Failure

Flashing 5                           Low Input Power or Relay Failure